Mechanisms to reduce the worst-case latency for ultra-low latency applications

Abstract

This disclosure describes systems, methods, and devices related to latency reduction. The device may set up a plurality of links between an access point (AP) multi-link device (MLD) and a non-AP MLD. The device may encode a frame for transmission on a first link of the plurality of links between a first AP of the AP MLD and a first STA of the non-AP MLD. The device may identify an indication received at a second STA of the non-AP MLD using an interference mitigation signal. The device may cause to stop the transmission of the frame on the first link based on the indication. The device may identify a second frame on the first link received from the first AP. The device may cause to resume the transmission of the first frame on the first link.

What is claimed is: 
     
       1. A device for a non-access point (AP) multi-link device (MLD) having a plurality of station devices (STAs), the device comprising processing circuitry coupled to storage, the processing circuitry configured: establish a multi-link operation with an AP MLD, wherein the AP MLD comprises a plurality of APs within the AP MLD; set up a plurality of links between the AP MLD and the non-AP MLD, wherein the multi-link operation connects on each link of the plurality of links a respective AP of the AP MLD with a respective device of the non-AP MLD; encode a first frame for transmission on a first link of the plurality of links between a first AP of the AP MLD and a first STA of the non-AP MLD; identify an indication received at a second STA of the non-AP MLD using an interference mitigation signal; cause to stop the transmission of the frame on the first link based on the indication; identify a second frame on the first link received from the first AP; and cause to resume the transmission of the first frame on the first link. 
     
     
       2. The device of  claim 1 , wherein the processing circuitry is further configured to cause to send an acknowledgement to the second frame. 
     
     
       3. The device of  claim 1 , wherein the first frame includes a first preamble and a number of medium access control (MAC) protocol data units (MPDUs). 
     
     
       4. The device of  claim 1 , wherein resuming the transmission includes adding a second preamble to remaining MPDUs of the first frame. 
     
     
       5. The device of  claim 1 , wherein the indication is a stop request and wherein the interference mitigation signal is a Zadoff-Chu sequence (ZC) sequence. 
     
     
       6. The device of  claim 5 , wherein the ZC sequence has a characteristic of z_i{circumflex over ( )}H z_j=0, i≠j. 
     
     
       7. The device of  claim 1 , wherein the processing circuitry is further configured to perform cross-correlation to determine that the stop request is assigned to the first STA. 
     
     
       8. The device of  claim 1 , wherein the indication includes a packet destined to the second STA on the second link. 
     
     
       9. The device of  claim 8 , wherein the packet is received on second link without stopping transmission on the first link. 
     
     
       10. The device of  claim 1 , wherein the non-AP MLD is a non-simultaneous transmit receive (STR) device. 
     
     
       11. A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising: establishing a multi-link operation with an AP MLD, wherein the AP MLD comprises a plurality of APs within the AP MLD; setting up a plurality of links between the AP MLD and the non-AP MLD, wherein the multi-link operation connects on each link of the plurality of links a respective AP of the AP MLD with a respective device of the non-AP MLD; encoding a first frame for transmission on a first link of the plurality of links between a first AP of the AP MLD and a first STA of the non-AP MLD; identifying an indication received at a second STA of the non-AP MLD using an interference mitigation signal; causing to stop the transmission of the frame on the first link based on the indication; identifying a second frame on the first link received from the first AP; and causing to resume the transmission of the first frame on the first link. 
     
     
       12. The non-transitory computer-readable medium of  claim 11 , wherein the operations further comprise causing to send an acknowledgement to the second frame. 
     
     
       13. The non-transitory computer-readable medium of  claim 11 , wherein the first frame includes a first preamble and a number of medium access control (MAC) protocol data units (MPDUs). 
     
     
       14. The non-transitory computer-readable medium of  claim 11 , wherein resuming the transmission includes adding a second preamble to remaining MPDUs of the first frame. 
     
     
       15. The non-transitory computer-readable medium of  claim 11 , wherein the indication is a stop request and wherein the interference mitigation signal is a Zadoff-Chu sequence (ZC) sequence. 
     
     
       16. The non-transitory computer-readable medium of  claim 15 , wherein the ZC sequence has a characteristic of z_i{circumflex over ( )}H z_j=0, i≠j. 
     
     
       17. The non-transitory computer-readable medium of  claim 11 , wherein the operations further comprise performing cross-correlation to determine that the stop request is assigned to the first STA. 
     
     
       18. The non-transitory computer-readable medium of  claim 11 , wherein the indication includes a packet destined to the second STA on the second link. 
     
     
       19. The non-transitory computer-readable medium of  claim 11 , wherein the non-AP MLD is a non-simultaneous transmit receive (STR) device. 
     
     
       20. A method comprising: establishing, by one or more processors, a multi-link operation with an AP MLD, wherein the AP MLD comprises a plurality of APs within the AP MLD; setting up a plurality of links between the AP MLD and the non-AP MLD, wherein the multi-link operation connects on each link of the plurality of links a respective AP of the AP MLD with a respective device of the non-AP MLD; encoding a first frame for transmission on a first link of the plurality of links between a first AP of the AP MLD and a first STA of the non-AP MLD; identifying an indication received at a second STA of the non-AP MLD using an interference mitigation signal; causing to stop the transmission of the frame on the first link based on the indication; identifying a second frame on the first link received from the first AP; and causing to resume the transmission of the first frame on the first link.